[dundarious]

> A major concern in naval intelligence is the collection of up-to-date acoustic signatures for contemporary vessels so that IUSS can correctly identify them.

Doesn’t identify the occupants but could perhaps identify the vessel, depending on how extensive these databases are. Of course that’s a massive open question and I don’t want to claim it extends to small rental vessels, but I also don’t want to claim it doesn’t!

The main thing to note is that OSINT types are working with poor quality manipulable data compared to what’s available to US/NATO, even if we focus only on larger vessels with AIS. Which is not to say US/NATO should be trusted in their public statements.